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"This is a pretty good question," Hanks said. "You better buckle your seatbelts because this question is about to blow your mind…. Libya."

Jason Sudeikis and Jay Pharaoh were back reprising their spot-on impressions of Mitt Romney and President Barack Obama respectively, while Aidy Bryant took on the role of moderator Candy Crowley. Once again, the duo nailed their imitations of the President and Romney, this time playing off how the two candidates went head-to-head in the fierce second presidential debate Tuesday.

"I think I get to say four more things," Romney (Sudeikis) said. Three more things and one more additional thing."

"What Governor Romney said is not true", President Obama (Pharaoh) said. "Ooh, I want to fight you so bad!," Romney quipped in response.

"Why am I hosting SNL tonight," the "Locked Out of Heaven" singer sang. "I might have bitten off more than I can chew….can I put aside my fears? Can I be like Timberlake?"

We might have to say a close second (in terms of musicians who've rocked the show).

Mars' lack of acting experience and nervousness didn't show as he took on a variety of characters throughout the evening, playing a butt-popping woman plagued with haters, a wacky wilderness lodge employee, and an overemotional man walking the streets of NYC in a mouse costume, among other roles.

In "Amusement Park," Hanks was back, along with Mars, playing creepy characters in a Halloween amusement park ride who were alive, unbeknownst to a couple of ride attendees.

Taran Killam took on Brad Pitt's now infamous Chanel No. 5 commercial, spoofing the ad in four different skits. "I'm sorry…is there really no script? Because I've been talking to myself for like two hours straight and I'm starting to sound insane," Killam said in one of the faux ads.

And Stefon was back on "Weekend Update" to tell viewers about the hottest spots in NYC for Halloween like Jelly Bones.

"As you walk in you'll be handed a glass of champagne…or is it piss," he quipped.

So, tell us, what did you think about Mars' hosting stint? Did he rock or fall flat?

Sound off in the comments.

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Your information may be shared with other NBCUniversal businesses and used to better tailor our services and advertising to you. For more details about how we use your information, see our Privacy Policy. If you are located outside of the U.S., your information may be transferred to, processed and used in the U.S.